package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //对前端传来的明文密码进行md5加密处理
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }



    /**
     * 新增员工
     * @param
     */
    @Override
    public void save(EmployeeDTO employeeDTO){
        System.out.println("当前线程id" + Thread.currentThread().getId());
        //说明客户端发送的每一次请求都是单独的线程
        Employee employee = new Employee();

        //spring提供的对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置账号状态，默认正常状态标识正常，标识锁定
        employee.setStatus(StatusConstant.ENABLE);
        //设置密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置两个时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());


        //设置当前记录的创建人id和修改人id

        //从存储空间中取出
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());

        /**
         * 插入员工数据
         */
        employeeMapper.insert(employee);

    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO){
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page =  employeeMapper.pageQuery(employeePageQueryDTO);

        long total= page.getTotal();
        List<Employee> records = page.getResult();
        return new PageResult(total,records);

    }

    /**
     * 员工状态修改
     * @param status
     * @param id
     */

    public void startOrStop(Integer status,Long id){
       //update employee set status = ? where id = ?
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);

        //或者使用builder
        /**
         * Employee employee = Employee.builder()
         *          .status(status)
         *          .id(id)
         *          .build();
         */

        employeeMapper.update(employee);
    }


    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    public Employee getById (Long id){
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("****");
        return employee;
    }




}
